Illus. in full color. "Clever "Cave Boy, " a.k.a. Harry, tells about his inventions--a bammer (a hammer) and a boomer (drums). To top if off, Harry is the only one who pleases Chief Grump on his birthday: Harry takes his newly invented wheel and makes a tricycle for the Chief. The humorous, clear illustrations give ample context clues to beginning readers, who will enjoy Harry. A good candidate to use in literature-based reading programs."--"School Library Journal. "